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Compressors - Interview Questions and Answers

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56. Out of the following, from where you will prefer to take intake for air compressor
A. from an air conditioned room maintained at 20�C
B. from outside atmosphere at 1�C
C. from coal yard side
D. from a side where cooling tower is located nearby
E. from any one of the above locations.
Explanation:
57. The compressor performance at higher altitude compared to sea level will be
A. same
B. higher
C. lower
D. dependent on other factors
E. none of the above.
Explanation:
58. To aviod moisture troubles, the compressed air main line should
A. rise gradually towards the point of use
B. drop gradually towards the point of use
C. be laid vertically
D. be laid exactly horizontally
E. none of the above
Explanation:
59. Volumetric efficiency of a compressor with clearance volume
A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. in not dependent upon compression ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable.
Explanation:
60. The compressor efficiency is the
A. isothermal H.P/indicated H.R
B. isothermal H.P./shaft H.R
C. total output/air input
D. compression work/motor input
E. none Of the above.
Explanation:
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